package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioProperties minioProperties;
    @Autowired
    private MinioClient minioClient;

    @Override
    public String upload(MultipartFile file) throws Exception {
        //检查目标minio桶是否存在
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());

        if (!bucketExists) {
            //创建目标存储桶
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            //设置桶的访问权限

            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().bucket(minioProperties.getBucketName()).config(policy(minioProperties.getBucketName())).build());
        }

        String fileName = new SimpleDateFormat("yyyyMMdd").format(new Date()) + "/" + UUID.randomUUID() + "/" + file.getOriginalFilename();

        minioClient.putObject(PutObjectArgs.builder().bucket(minioProperties.getBucketName()).object(fileName).stream(file.getInputStream(), file.getSize(), -1).contentType(file.getContentType()).build());


        String url = String.join("/", minioProperties.getEndpoint(), minioProperties.getBucketName(), fileName);

        return url;
    }
    private String policy(String bucketName){
        return  """
                    {
                      "Statement" : [ {
                        "Action" : "s3:GetObject",
                        "Effect" : "Allow",
                        "Principal" : "*",
                        "Resource" : "arn:aws:s3:::%s/*"
                      } ],
                      "Version" : "2012-10-17"
                    }""".format(bucketName);
    }
}
